Results 241 to 250 of about 86,247 (358)

Intrinsic PPG–ECG Coupling for Accurate and Low‐Power Blood Pressure Monitoring

open access: yesAdvanced Science, EarlyView.
A PPG–ECG coupling strategy for continuous blood pressure monitoring that intrinsically synchronizes signals within a single waveform is demonstrated, minimizing synchronization errors and hardware complexity. This approach halves power consumption while maintaining high accuracy, enabling compact, energy‐efficient wearable devices for personalized ...
Sitong Chen   +5 more
wiley   +1 more source

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

open access: yesAdvanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas   +6 more
wiley   +1 more source

Detected Shifts Towards Drought-Adaptive Strategies in the Amazon Forest Over the Last Four Decades. [PDF]

open access: yesGlob Chang Biol
Barbosa M   +7 more
europepmc   +1 more source

Correlation between remote sensing data and ground based measurements for solar reflectance retrieving

open access: green, 2015
Francesca Despini   +6 more
openalex   +2 more sources

Nickel‐Catalyzed Twofold Conjunctive Coupling via Philicity‐Alternating Radical Relay

open access: yesAdvanced Science, EarlyView.
Herein, we disclose a nickel‐catalyzed twofold conjunctive coupling that enables a four‐component assembly involving an activated alkene, a 1,3‐enyne, and both alkyl and aryl halides. Multiple C–C bonds are selectively constructed through a philicity‐alternating radical relay and the selective radical capture by the nickel catalyst.
Ji Hwan Jeon   +7 more
wiley   +1 more source

An assessment of Landsat-8 atmospheric correction schemes and remote sensing reflectance products in coral reefs and coastal turbid waters

open access: hybrid, 2018
Jianwei Wei   +7 more
openalex   +2 more sources

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